
sajjadrezaeifard425
Great
Cyrtometopus clavifrons (Dalman, 1827)
Size: trilobite size 62 (with spines of pygidium) x 31 mm; the length of the spines of cheeks is approx. 12 mm; the length of the spines of pygidium is approx. 25 mm; approx. matrix size 110 x 110 x 30 mm, weight 317 gram. Locality: Voibokalo quarry, St. Petersburg region, Russia. Age: Kunda Horizon, Lower Ordovician, zone Asaphus expansus (468 million year ago).